1 1/2 oz of Stoli Razberi vodka (or berry-infused vodka)
4 1/2 oz of jose cuervo margarita mix (or Margarita Mix)
1 oz of creme de cassis (or blackcurrant-flavored liqueur)
1 oz of blue curacao liqueur
Pour everything into a shaker, and shake until frosted. Should turn a blue-grey color. Strain into a glass with or without ice. Serve.